Answer:

1. Energy flow is the flow of energy through living things within an ecosystem. All living organisms can be organized into producers and consumers, and those producers and consumers can further be organized into a food chain. Each of the levels within the food chain is a trophic level.
2. C I'm not sure correct me if I'm wrong thank you

Explanation:

During the process of energy flow in the ecosystem, plants being the producers absorb sunlight with the help of the chloroplasts and a part of it is transformed into chemical energy in the process of photosynthesis. ... Finally, when tertiary consumers consume the carnivores, energy will again be degraded.